Final answer:
Training is crucial for understanding the structure and operation of an organization. For Nia to gain comprehensive knowledge of the entire organization, the most appropriate type of training would be d) Cross-functional training.
Step-by-step explanation:
Cross-functional training involves learning about different departments and aspects of the company, beyond one's own role. This approach enables an employee to see the bigger picture of how different parts of the organization interact and contribute to its overall success.
Typically, organizations start with an orientation period where new hires learn about company history, policies, and culture. This can include orientation training using software or group presentations. However, to deeply understand all the functional areas and how they interrelate, Nia would benefit most from cross-functional training, which might involve shadowing professionals in different departments, participating in interdisciplinary projects, or attending informational sessions on various company functions.